bug#64615: Build failure on head version (2df086)

[Eric S. Raymond]

Doing ./configure && make under Ubuntu Linux, last few lines are 

 load("progmodes/prog-mode")
  load("loadup.el")
Eager macro-expansion failure: (void-function define-short-documentation-group)
make[2]: *** [Makefile:924: bootstrap-emacs.pdmp] Error 255
make[2]: Leaving directory '/mnt/ssd/home/esr/src/emacs/src'

followed by make failure boilerplate.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>

"Are we to understand," asked the judge, "that you hold your own interests
above the interests of the public?"

"I hold that such a question can never arise except in a society of cannibals."
        -- Ayn Rand